If the nucleus is not the brains of the cell but merely contains the instructions on how to do things – replicate the cell? make proteins? – then what are the brains of the cell? The command centre as it were. Our brains tell our body what to do – run, eat etc, what tells the cells what to do?
Also animals have mitochondria which convert food and oxygen into energy and plants have chloroplasts which use the energy from sunlight – (to make food for the plant?) Why then has some organism not evolved that uses chloroplasts but is mobile like animals? Plankton? Are they plants? Do they do the same thing like plants? Use chloroplasts? Are they unicellular or multicellular? why have they not evolved to form a complex life form like a whale for example? Surely life forms that use solar energy directly would have some advantages?

The latest from Seth on Huffington Post:

If scientists ever succeed in making contact with extraterrestrial beings, who gets to steer the conversation? Indeed, how do we even have a conversation? Despite what Gene Roddenberry told you... (read more)